(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*

This guide provides a more detailed description of the syntax that is supported along with examples.

This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.

Concept Search - What can I type?

For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.

Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.

Publishing Venue

Related People

Abstract

A scalable point-of-load power supply design utilizing piezoelectric transformer coupling mechanism and air-core inductor components such that the design is immune to the effects of strong static magnetic fields, whereby the entire power supply is located within the strong magnetic field.

Copyright

Country

Language

At least one non-text object (such as an image or picture) has been suppressed.

This is the abbreviated version, containing approximately
55% of the total text.

Technical Publication No. 05-001

Power Supply Designed for
Operation in Very
High Strength Magnetic Fields



L. Robert
Crouthamel, Kevin M. Thuer, Dale Poth

A scalable
point-of-load power supply design utilizing piezoelectric transformer coupling
mechanism and air-core inductor components such that the design is immune to
the effects of strong static magnetic fields, whereby the entire power supply
is located within the strong magnetic field.

SPECIFICATION

The
piezoelectric transformer may be driven open-loop or controlled by a
closed-loop system, which adjusts the frequency and or amplitude of the
excitation signal to regulate the output amplitude. Inductors required for
creating the excitation (input) waveform, or used in the filtering or
rectification of the output waveform utilize air-core designs to prevent
saturation that would occur with conventional (iron core) inductors.

This
type of power supply could be implemented in various topologies which currently
use conventional transformers, including:

·
DC-AC
(Step-Up) Inverter

·
Switch
mode Isolated DC-DC converters (step up or down) of various topologies

Examples of
Applications:

·
Backlight
Inverter for LCD Display in or near the bore of MRI machine or other
environment with a very strong magnetic field

·
Voltage
regulation for circuitry in accessories or subsystems used in an MRI or other
environments with a very strong magnetic field

·
Isolated
Power Supply for Medical Devices used in the MRI Environment (e.g., patient
interfaces, device interconnects, serial ports, display interfaces) or other
environment with very strong magnetic fields

·
Isolated
Power Supply for other applications in environments with very strong magnetic
fields

Novel Features:

·
Efficiently
provides isolated or non-isolated voltage regulation to loads in an environment
with a strong static magnetic field

·
Power
supply can be positioned at the point of load in magnetic environment -- can
efficiently supply very high voltage loads without cabling losses,
capacitive/inductive loading

·
Can
efficiently provide a high degree of electrical isolation, unlike air core
transformers in which efficiency drops with increased separation (isolation)

In prior
art, one of the following approaches is used for power supplies in strong
magnetic fields:

·
Linear
Regulation which does not require transformers or inductors, and is therefore
immune to magnetic fields, but is unable to provide any of the following:
Isolation, step-up conversion, or DC-AC inversion